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rofi/source/helper.c
Dave Davenport 07425fd10a Always refilter when switching modi.
2016-10-11 08:11:14 +02:00

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/**
* rofi
*
* MIT/X11 License
* Copyright (c) 2012 Sean Pringle <sean.pringle@gmail.com>
* Modified 2013-2016 Qball Cow <qball@gmpclient.org>
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
*/
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <fcntl.h>
#include <glib.h>
#include <glib/gstdio.h>
#include <sys/types.h>
#include <sys/file.h>
#include <sys/stat.h>
#include <pwd.h>
#include <ctype.h>
#include <xcb/xcb.h>
#include <pango/pango.h>
#include <pango/pango-fontmap.h>
#include <pango/pangocairo.h>
#include "helper.h"
#include "settings.h"
#include "x11-helper.h"
#include "rofi.h"
#include "view.h"
const char *const monitor_position_entries[] = {
"on focused monitor",
"on focused window",
"at mouse pointer",
"on monitor with focused window",
"on monitor that has mouse pointer"
};
extern xcb_connection_t *xcb_connection;
extern xcb_screen_t *xcb_screen;
static int stored_argc = 0;
static char **stored_argv = NULL;
void cmd_set_arguments ( int argc, char **argv )
{
stored_argc = argc;
stored_argv = argv;
}
/**
* @param info To Match information on.
* @param res The string being generated.
* @param data User data
*
* Replace the entries. This function gets called by g_regex_replace_eval.
*
* @returns TRUE to stop replacement, FALSE to continue
*/
static gboolean helper_eval_cb ( const GMatchInfo *info, GString *res, gpointer data )
{
gchar *match;
// Get the match
match = g_match_info_fetch ( info, 0 );
if ( match != NULL ) {
// Lookup the match, so we can replace it.
gchar *r = g_hash_table_lookup ( (GHashTable *) data, match );
if ( r != NULL ) {
// Append the replacement to the string.
g_string_append ( res, r );
}
// Free match.
g_free ( match );
}
// Continue replacement.
return FALSE;
}
int helper_parse_setup ( char * string, char ***output, int *length, ... )
{
GError *error = NULL;
GHashTable *h;
h = g_hash_table_new ( g_str_hash, g_str_equal );
// By default, we insert terminal and ssh-client
g_hash_table_insert ( h, "{terminal}", config.terminal_emulator );
g_hash_table_insert ( h, "{ssh-client}", config.ssh_client );
// Add list from variable arguments.
va_list ap;
va_start ( ap, length );
while ( 1 ) {
char * key = va_arg ( ap, char * );
if ( key == NULL ) {
break;
}
char *value = va_arg ( ap, char * );
if ( value == NULL ) {
break;
}
g_hash_table_insert ( h, key, value );
}
va_end ( ap );
// Replace hits within {-\w+}.
GRegex *reg = g_regex_new ( "{[-\\w]+}", 0, 0, NULL );
char *res = g_regex_replace_eval ( reg, string, -1, 0, 0, helper_eval_cb, h, NULL );
// Free regex.
g_regex_unref ( reg );
// Destroy key-value storage.
g_hash_table_destroy ( h );
// Parse the string into shell arguments.
if ( g_shell_parse_argv ( res, length, output, &error ) ) {
g_free ( res );
return TRUE;
}
g_free ( res );
// Throw error if shell parsing fails.
if ( error ) {
char *msg = g_strdup_printf ( "Failed to parse: '%s'\nError: '%s'", string, error->message );
rofi_view_error_dialog ( msg, FALSE );
g_free ( msg );
// print error.
g_error_free ( error );
}
return FALSE;
}
void tokenize_free ( GRegex ** tokens )
{
for ( size_t i = 0; tokens && tokens[i]; i++ ) {
g_regex_unref ( (GRegex *) tokens[i] );
}
g_free ( tokens );
}
static gchar *glob_to_regex ( const char *input )
{
gchar *r = g_regex_escape_string ( input, -1 );
size_t str_l = strlen ( r );
for ( size_t i = 0; i < str_l; i++ ) {
if ( r[i] == '\\' ) {
if ( r[i + 1] == '*' ) {
r[i] = '.';
}
else if ( r[i + 1] == '?' ) {
r[i + 1] = 'S';
}
i++;
}
}
return r;
}
static gchar *fuzzy_to_regex ( const char * input )
{
GString *str = g_string_new ( "" );
gchar *r = g_regex_escape_string ( input, -1 );
gchar *iter;
int first = 1;
for ( iter = r; iter && *iter != '\0'; iter = g_utf8_next_char ( iter ) ) {
if ( first ) {
g_string_append ( str, "(" );
}
else {
g_string_append ( str, ".*(" );
}
g_string_append_unichar ( str, g_utf8_get_char ( iter ) );
g_string_append ( str, ")" );
first = 0;
}
g_free ( r );
char *retv = str->str;
g_string_free ( str, FALSE );
return retv;
}
static GRegex * create_regex ( const char *input, int case_sensitive )
{
#define R( s ) g_regex_new ( s, G_REGEX_OPTIMIZE | ( ( case_sensitive ) ? 0 : G_REGEX_CASELESS ), 0, NULL )
GRegex * retv = NULL;
gchar *r;
switch ( config.matching_method )
{
case MM_GLOB:
r = glob_to_regex ( input );
retv = R ( r );
g_free ( r );
break;
case MM_REGEX:
retv = R ( input );
if ( retv == NULL ) {
r = g_regex_escape_string ( input, -1 );
retv = R ( r );
g_free ( r );
}
break;
case MM_FUZZY:
r = fuzzy_to_regex ( input );
retv = R ( r );
g_free ( r );
break;
default:
r = g_regex_escape_string ( input, -1 );
retv = R ( r );
g_free ( r );
break;
}
return retv;
}
GRegex **tokenize ( const char *input, int case_sensitive )
{
if ( input == NULL ) {
return NULL;
}
size_t len = strlen ( input );
if ( len == 0 ) {
return NULL;
}
char *saveptr = NULL, *token;
GRegex **retv = NULL;
if ( !config.tokenize ) {
retv = g_malloc0 ( sizeof ( GRegex* ) * 2 );
retv[0] = (GRegex *) create_regex ( input, case_sensitive );
return retv;
}
// First entry is always full (modified) stringtext.
int num_tokens = 0;
// Copy the string, 'strtok_r' modifies it.
char *str = g_strdup ( input );
// Iterate over tokens.
// strtok should still be valid for utf8.
const char * const sep = " ";
for ( token = strtok_r ( str, sep, &saveptr ); token != NULL; token = strtok_r ( NULL, sep, &saveptr ) ) {
retv = g_realloc ( retv, sizeof ( GRegex* ) * ( num_tokens + 2 ) );
retv[num_tokens] = (GRegex *) create_regex ( token, case_sensitive );
retv[num_tokens + 1] = NULL;
num_tokens++;
}
// Free str.
g_free ( str );
return retv;
}
// cli arg handling
int find_arg ( const char * const key )
{
int i;
for ( i = 0; i < stored_argc && strcasecmp ( stored_argv[i], key ); i++ ) {
;
}
return i < stored_argc ? i : -1;
}
int find_arg_str ( const char * const key, char** val )
{
int i = find_arg ( key );
if ( val != NULL && i > 0 && i < stored_argc - 1 ) {
*val = stored_argv[i + 1];
return TRUE;
}
return FALSE;
}
int find_arg_int ( const char * const key, int *val )
{
int i = find_arg ( key );
if ( val != NULL && i > 0 && i < ( stored_argc - 1 ) ) {
*val = strtol ( stored_argv[i + 1], NULL, 10 );
return TRUE;
}
return FALSE;
}
int find_arg_uint ( const char * const key, unsigned int *val )
{
int i = find_arg ( key );
if ( val != NULL && i > 0 && i < ( stored_argc - 1 ) ) {
*val = strtoul ( stored_argv[i + 1], NULL, 10 );
return TRUE;
}
return FALSE;
}
char helper_parse_char ( const char *arg )
{
int len = strlen ( arg );
// If the length is 1, it is not escaped.
if ( len == 1 ) {
return arg[0];
}
// If the length is 2 and the first character is '\', we unescape it.
if ( len == 2 && arg[0] == '\\' ) {
// New line
if ( arg[1] == 'n' ) {
return '\n';
}
// Bell
else if ( arg[1] == 'a' ) {
return '\a';
}
// Backspace
else if ( arg[1] == 'b' ) {
return '\b';
}
// Tab
else if ( arg[1] == 't' ) {
return '\t';
}
// Vertical tab
else if ( arg[1] == 'v' ) {
return '\v';
}
// Form feed
else if ( arg[1] == 'f' ) {
return '\f';
}
// Carriage return
else if ( arg[1] == 'r' ) {
return '\r';
}
// Forward slash
else if ( arg[1] == '\\' ) {
return '\\';
}
else if ( arg[1] == '0' ) {
return '\0';
}
}
if ( len > 2 && arg[0] == '\\' && arg[1] == 'x' ) {
return (char) strtol ( &arg[2], NULL, 16 );
}
fprintf ( stderr, "Failed to parse character string: \"%s\"\n", arg );
// for now default to newline.
return '\n';
}
int find_arg_char ( const char * const key, char *val )
{
int i = find_arg ( key );
if ( val != NULL && i > 0 && i < ( stored_argc - 1 ) ) {
*val = helper_parse_char ( stored_argv[i + 1] );
return TRUE;
}
return FALSE;
}
PangoAttrList *token_match_get_pango_attr ( GRegex **tokens, const char *input, PangoAttrList *retv )
{
// Do a tokenized match.
if ( tokens ) {
for ( int j = 0; tokens[j]; j++ ) {
GMatchInfo *gmi = NULL;
g_regex_match ( (GRegex *) tokens[j], input, G_REGEX_MATCH_PARTIAL, &gmi );
while ( g_match_info_matches ( gmi ) ) {
int count = g_match_info_get_match_count ( gmi );
for ( int index = ( count > 1 ) ? 1 : 0; index < count; index++ ) {
int start, end;
g_match_info_fetch_pos ( gmi, index, &start, &end );
PangoAttribute *pa = pango_attr_underline_new ( PANGO_UNDERLINE_SINGLE );
PangoAttribute *pa2 = pango_attr_weight_new ( PANGO_WEIGHT_BOLD );
pa2->start_index = pa->start_index = start;
pa2->end_index = pa->end_index = end;
pango_attr_list_insert ( retv, pa );
pango_attr_list_insert ( retv, pa2 );
}
g_match_info_next ( gmi, NULL );
}
g_match_info_free ( gmi );
}
}
return retv;
}
int token_match ( GRegex * const *tokens, const char *input )
{
int match = 1;
// Do a tokenized match.
if ( tokens ) {
for ( int j = 0; match && tokens[j]; j++ ) {
match = g_regex_match ( (const GRegex *) tokens[j], input, 0, NULL );
}
}
return match;
}
int execute_generator ( const char * cmd )
{
char **args = NULL;
int argv = 0;
helper_parse_setup ( config.run_command, &args, &argv, "{cmd}", cmd, NULL );
int fd = -1;
GError *error = NULL;
g_spawn_async_with_pipes ( NULL, args, NULL, G_SPAWN_SEARCH_PATH, NULL, NULL, NULL, NULL, &fd, NULL, &error );
if ( error != NULL ) {
char *msg = g_strdup_printf ( "Failed to execute: '%s'\nError: '%s'", cmd, error->message );
fputs ( msg, stderr );
fputs ( "\n", stderr );
rofi_view_error_dialog ( msg, FALSE );
g_free ( msg );
// print error.
g_error_free ( error );
fd = -1;
}
g_strfreev ( args );
return fd;
}
int create_pid_file ( const char *pidfile )
{
if ( pidfile == NULL ) {
return -1;
}
int fd = g_open ( pidfile, O_RDWR | O_CREAT, S_IRUSR | S_IWUSR );
if ( fd < 0 ) {
fprintf ( stderr, "Failed to create pid file." );
return -1;
}
// Set it to close the File Descriptor on exit.
int flags = fcntl ( fd, F_GETFD, NULL );
flags = flags | FD_CLOEXEC;
if ( fcntl ( fd, F_SETFD, flags, NULL ) < 0 ) {
fprintf ( stderr, "Failed to set CLOEXEC on pidfile." );
remove_pid_file ( fd );
return -1;
}
// Try to get exclusive write lock on FD
int retv = flock ( fd, LOCK_EX | LOCK_NB );
if ( retv != 0 ) {
fprintf ( stderr, "Failed to set lock on pidfile: Rofi already running?\n" );
fprintf ( stderr, "Got error: %d %s\n", retv, strerror ( errno ) );
remove_pid_file ( fd );
return -1;
}
if ( ftruncate ( fd, (off_t) 0 ) == 0 ) {
// Write pid, not needed, but for completeness sake.
char buffer[64];
int length = snprintf ( buffer, 64, "%i", getpid () );
ssize_t l = 0;
while ( l < length ) {
l += write ( fd, &buffer[l], length - l );
}
}
return fd;
}
void remove_pid_file ( int fd )
{
if ( fd >= 0 ) {
if ( close ( fd ) ) {
fprintf ( stderr, "Failed to close pidfile: '%s'\n", strerror ( errno ) );
}
}
}
/**
* Do some input validation, especially the first few could break things.
* It is good to catch them beforehand.
*
* This functions exits the program with 1 when it finds an invalid configuration.
*/
int config_sanity_check ( void )
{
int found_error = FALSE;
GString *msg = g_string_new (
"<big><b>The configuration failed to validate:</b></big>\n" );
if ( config.matching ) {
if ( g_strcmp0 ( config.matching, "regex" ) == 0 ) {
config.matching_method = MM_REGEX;
}
else if ( g_strcmp0 ( config.matching, "glob" ) == 0 ) {
config.matching_method = MM_GLOB;
}
else if ( g_strcmp0 ( config.matching, "fuzzy" ) == 0 ) {
config.matching_method = MM_FUZZY;
}
else if ( g_strcmp0 ( config.matching, "normal" ) == 0 ) {
config.matching_method = MM_NORMAL;;
}
else {
g_string_append_printf ( msg, "\t<b>config.matching</b>=%s is not a valid matching strategy.\nValid options are: glob, regex, fuzzy or normal.\n",
config.matching );
found_error = 1;
}
}
if ( config.element_height < 1 ) {
g_string_append_printf ( msg, "\t<b>config.element_height</b>=%d is invalid. An element needs to be atleast 1 line high.\n",
config.element_height );
config.element_height = 1;
found_error = TRUE;
}
if ( config.menu_columns == 0 ) {
g_string_append_printf ( msg, "\t<b>config.menu_columns</b>=%d is invalid. You need at least one visible column.\n",
config.menu_columns );
config.menu_columns = 1;
found_error = TRUE;
}
if ( config.menu_width == 0 ) {
g_string_append_printf ( msg, "<b>config.menu_width</b>=0 is invalid. You cannot have a window with no width." );
config.menu_columns = 50;
found_error = TRUE;
}
if ( !( config.location >= WL_CENTER && config.location <= WL_WEST ) ) {
g_string_append_printf ( msg, "\t<b>config.location</b>=%d is invalid. Value should be between %d and %d.\n",
config.location, WL_CENTER, WL_WEST );
config.location = WL_CENTER;
found_error = 1;
}
// Check size
{
int ssize = monitor_get_smallest_size ( );
workarea mon;
if ( monitor_active ( &mon ) ) {
ssize = MIN ( mon.w, mon.h );
}
else{
const char *name = config.monitor;
if ( name && name[0] == '-' ) {
int index = name[1] - '0';
if ( index < 5 && index > 0 ) {
name = monitor_position_entries[index - 1];
}
}
g_string_append_printf ( msg, "\t<b>config.monitor</b>=%s Could not find monitor.\n", name );
found_error = TRUE;
}
// Have todo an estimate here.
if ( ( 2 * ( config.padding + config.menu_bw ) ) > ( 0.9 * ssize ) ) {
g_string_append_printf ( msg, "\t<b>config.padding+config.menu_bw</b>=%d is too big for the minimum size of the monitor: %d.\n",
( config.padding + config.menu_bw ), ssize );
config.padding = 0;
config.menu_bw = 0;
found_error = TRUE;
}
}
if ( config.menu_font ) {
PangoFontDescription *pfd = pango_font_description_from_string ( config.menu_font );
const char *fam = pango_font_description_get_family ( pfd );
int size = pango_font_description_get_size ( pfd );
if ( fam == NULL || size == 0 ) {
g_string_append_printf ( msg, "Pango failed to parse font: '%s'\n", config.menu_font );
g_string_append_printf ( msg, "Got font family: <b>%s</b> at size <b>%d</b>\n", fam ? fam : "{unknown}", size );
config.menu_font = NULL;
found_error = TRUE;
}
pango_font_description_free ( pfd );
}
if ( g_strcmp0 ( config.monitor, "-3" ) == 0 ) {
// On -3, set to location 1.
config.location = 1;
config.fullscreen = 0;
}
if ( found_error ) {
g_string_append ( msg, "Please update your configuration." );
rofi_view_error_dialog ( msg->str, TRUE );
return TRUE;
}
g_string_free ( msg, TRUE );
return FALSE;
}
char *rofi_expand_path ( const char *input )
{
char **str = g_strsplit ( input, G_DIR_SEPARATOR_S, -1 );
for ( unsigned int i = 0; str && str[i]; i++ ) {
// Replace ~ with current user homedir.
if ( str[i][0] == '~' && str[i][1] == '\0' ) {
g_free ( str[i] );
str[i] = g_strdup ( g_get_home_dir () );
}
// If other user, ask getpwnam.
else if ( str[i][0] == '~' ) {
struct passwd *p = getpwnam ( &( str[i][1] ) );
if ( p != NULL ) {
g_free ( str[i] );
str[i] = g_strdup ( p->pw_dir );
}
}
else if ( i == 0 ) {
char * s = str[i];
if ( input[0] == G_DIR_SEPARATOR ) {
str[i] = g_strdup_printf ( "%s%s", G_DIR_SEPARATOR_S, s );
g_free ( s );
}
}
}
char *retv = g_build_filenamev ( str );
g_strfreev ( str );
return retv;
}
#define MIN3( a, b, c ) ( ( a ) < ( b ) ? ( ( a ) < ( c ) ? ( a ) : ( c ) ) : ( ( b ) < ( c ) ? ( b ) : ( c ) ) )
unsigned int levenshtein ( const char *needle, const char *haystack )
{
unsigned int x, y, lastdiag, olddiag;
size_t needlelen = g_utf8_strlen ( needle, -1 );
size_t haystacklen = g_utf8_strlen ( haystack, -1 );
unsigned int column[needlelen + 1];
for ( y = 0; y <= needlelen; y++ ) {
column[y] = y;
}
for ( x = 1; x <= haystacklen; x++ ) {
const char *needles = needle;
column[0] = x;
gunichar haystackc = g_utf8_get_char ( haystack );
if ( !config.case_sensitive ) {
haystackc = g_unichar_tolower ( haystackc );
}
for ( y = 1, lastdiag = x - 1; y <= needlelen; y++ ) {
gunichar needlec = g_utf8_get_char ( needles );
if ( !config.case_sensitive ) {
needlec = g_unichar_tolower ( needlec );
}
olddiag = column[y];
column[y] = MIN3 ( column[y] + 1, column[y - 1] + 1, lastdiag + ( needlec == haystackc ? 0 : 1 ) );
lastdiag = olddiag;
needles = g_utf8_next_char ( needles );
}
haystack = g_utf8_next_char ( haystack );
}
return column[needlelen];
}
char * rofi_latin_to_utf8_strdup ( const char *input, gssize length )
{
gsize slength = 0;
return g_convert_with_fallback ( input, length, "UTF-8", "latin1", "\uFFFD", NULL, &slength, NULL );
}
char * rofi_force_utf8 ( gchar *start, ssize_t length )
{
if ( start == NULL ) {
return NULL;
}
const char *data = start;
const char *end;
GString *string;
if ( g_utf8_validate ( data, length, &end ) ) {
return g_memdup ( start, length + 1 );
}
string = g_string_sized_new ( length + 16 );
do {
/* Valid part of the string */
g_string_append_len ( string, data, end - data );
/* Replacement character */
g_string_append ( string, "\uFFFD" );
length -= ( end - data ) + 1;
data = end + 1;
} while ( !g_utf8_validate ( data, length, &end ) );
if ( length ) {
g_string_append_len ( string, data, length );
}
return g_string_free ( string, FALSE );
}
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